Assumption-Based User Modeling

The User Model includes threre possible kinds of facts:

• Premises, i.e., known, certain information observed about the user; present in all the possible models.

• Assumptions, i.e., default information inherited from the stereotypes; labelled with a plausibility measure, called Derivation Source, which encodes information about the specific derivation of the assumptions.

• Derived data, i.e., information inferred from premises and assumptions through inference procedure directly managed by the application.

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